QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE HIGH AND LOW ENABLES QS3862 QS32862 ADVANCE INFORMATION FEATURES/BENEFITS DESCRIPTION * * * * * * * The QS3862 and QS32862 each provide a set of ten high speed CMOS, TTL Compatible bus switches. The low ON resistance (5) of the QS3862 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The switches are controlled by independent active Low enable (BE) and active High enable (BE) controls. The QS32862 includes internal 25 series termination resistors to reduce reflection noise in high speed applications. When closed, the switch acts as the source (series) termination for the driver connected to it. The QS3862 is ideal for switching digital buses as well as hotplugging, hot-docking, and voltage translation. Enhanced N channel FET with no inherent diode to VCC bidirectional switches connect inputs to outputs 5 Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control pins Available in 24-pin QSOP, and SOIC (SO) packages version for low noise QS32862 is 25 Active Low and High enable control APPLICATIONS * Hot-swapping, hot-docking (Application Note AN-13) * Voltage translation (5V to 3.3V; Application Note AN-11) * Power conservation * Capacitance reduction and isolation * Applications requiring Active-High enabling * Bus isolation * Clock gating FUNCTIONAL BLOCK DIAGRAM A0 B0 A9 B9 BE BE OCTOBER 1999 1 1999 Integrated Device Technology, Inc DSC-XXXXXX QS3862 AND QS32862 IDT PIN DESCRIPTION PIN CONFIGURATION Name I/O Function BE I Active High Bus Enable BE I Active High Bus Enable A0-A9 I/O Bus A B0-B9 I/O Bus B (ALL PINS TOP VIEW) QSOP, SOIC (SO) FUNCTION TABLE BE 1 24 A0 2 23 BE VCC A1 3 22 B0 A2 4 21 B1 A3 5 20 B2 A4 6 19 B3 A5 7 18 B4 BE BE A0-A9 Function A6 8 17 B5 L L Hi-Z Disconnect A7 9 16 B6 L H Hi-Z Disconnect A8 10 15 B7 Connect A9 11 14 B8 G ND 12 13 B9 H L B0-B9 L L Hi-Z Disconnect ABSOLUTE MAXIMUM RATINGS Supply Voltage to Ground ...................................................................... -0.5V to +7.0V DC Switch Voltage VS ............................................................................ -0.5V to +7.0V DC Input Voltage VIN .............................................................................. -0.5V to +7.0V AC Input Voltage (for a pulse width 20ns) .......................................................... -3.0V DC Output Current Max. Sink Current/Pin ........................................................... 120mA Maximum Power Dissipation ............................................................................ 0.5 watts TSTG Storage Temperature .................................................................... -65 to +150C Note: ABSOLUTE MAXIMUM CONTINUOUS RATINGS are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum conditions is not implied. CAPACITANCE TA = 25C, f = 1MHz, VIN = 0V Pins QSOP, SOIC Typ Max Unit Control Inputs 3 5 pF QuickSwitch Channels (Swithc OFF) 5 7 pF Note: Capacitance is characterized but not production tested. For total capacitance while the switch is ON, please see Section 1 under "Input and Switch Capacitance." 2 1999 Integrated Device Technology, Inc DSC-XXXXXX IDT QS3862 AND QS32862 DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE TA = -40C to 85C, VCC = 5.0V 10% Symbol Parameter Test Conditions Min Typ(1) Max Unit VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2.0 -- -- V VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs -- -- 0.8 V Input Leakage Current 0 VIN VCC -- 0.01 1 A -- 0.01 1 A 3862 -- 5 7 32862 20 28 40 3862 -- 10 15 32862 20 35 48 3.7 4 4.2 | IIN | (Control Inputs) | IOZ | Off-State Current (Hi-Z) 0 VOUT VCC, Switches Off RON Switch ON Resistance(2) VCC = Min., VIN = 0.0V, RON Switch ON Resistance ION = 30mA VCC = Min., VIN = 2.4V (2) ION = 15mA VP Pass Voltage(3) VIN = VCC = 5V, IOUT = -5A V Notes: 1. Typical values indicate VCC = 5.0V and TA = 25C. 2. For a diagram explaining the procedure for RON measurement, please see Section 1 under "DC Electrical Characteristics." Max. value of RON guaranteed, but not production tested. 3. Pass Voltage is guaranteed but not production tested. TYPICAL ON RESISTANCE VS VIN AT VCC = 5.0V (QS3862) 16 14 12 R ON (ohm s) 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 V IN (Volts) Note: For QS32862, add 23 to RON shown. 3 1999 Integrated Device Technology, Inc DSC-XXXXXX QS3862 AND QS32862 IDT POWER SUPPLY CHARACTERISTICS OVER OPERATING RANGE TA = -40C to 85C, VCC = 5.0V 10% Symbol Parameter Test Conditions(1) Typ(2) Max Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 0.2 3.0 A ICC Power Supply Current per Input HIGH VCC = Max., VIN = 3.4V(3), f = 0 per Control Input -- 2.5 mA QCCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B Pins Open, BE, BE Inputs Toggling @ 50% Duty Cycle -- 0.25 mA/ MHz Notes: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC specifications. 2. Typical Values are at VCC = 5.0V, +25C Ambient. 3. Per TTL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ICC. 4. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is guaranteed, but not production tested. SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40C to 85C, VCC = 5.0V 10% CLOAD = 50pF, RLOAD = 500 unless otherwise noted. Description(1) Min QS3862 Typ Max Min QS32862 Typ Max Unit tPLH tPHL Data Propagation Delay(2,4) A to B or B to A -- -- 0.25(3) -- -- 1.25(3) ns tPZL tPZH Switch Turn-on Delay BE or BE to A or B 1.5 -- 6.5 1.5 -- 7.5 ns tPLZ tPHZ Switch Turn-off Delay(2) BE or BE to A or B 1.5 -- 5.5 1.5 -- 5.5 ns Symbol Notes: 1. See Test Circuit and Waveforms. Minimums guaranteed but not production tested. 2. This parameter is guaranteed, but not production tested. 3. The time constant for the switch alone is of the order of 0.25ns for QS3862 and 1.25ns for QS32862 at C L = 50pF.The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagation delay to the system. Propagation delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side. CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 4 1999 Integrated Device Technology, Inc DSC-XXXXXX